frontend/src/utils.js

/* 去重 */
export function deWeightThree(data, key) {
  let map = new Map()
  for (let item of data) {
    if (!map.has(item[key])) {
      map.set(item[key], item)
    }
  }
  return [...map.values()]
}

/* uuid生成器 */
export function uuid(len, radix) {
  var chars =
    '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
  var uuid = [],
    i
  radix = radix || chars.length

  if (len) {
    // Compact form
    for (i = 0; i < len; i++) uuid[i] = chars[0 | (Math.random() * radix)]
  } else {
    // rfc4122, version 4 form
    var r

    // rfc4122 requires these characters
    uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
    uuid[14] = '4'

    // Fill in random data.  At i==19 set the high bits of clock sequence as
    // per rfc4122, sec. 4.1.5
    for (i = 0; i < 36; i++) {
      if (!uuid[i]) {
        r = 0 | (Math.random() * 16)
        uuid[i] = chars[i == 19 ? (r & 0x3) | 0x8 : r]
      }
    }
  }

  return uuid.join('')
}

//计算两个时间差  返回天
export function timeDiff(begin_time, end_time) {
  //年月日时分秒转换为时间戳
  let beginTime = new Date(begin_time).getTime() / 1000
  let endTime = new Date(end_time).getTime() / 1000
  var starttime = ''
  var endtime = ''
  if (beginTime < endTime) {
    starttime = beginTime
    endtime = endTime
  } else {
    starttime = endTime
    endtime = beginTime
  }
  //计算天数
  var timediff = endtime - starttime
  var days = parseInt(timediff / 86400)
  //计算小时数
  var remain = timediff % 86400
  var hours = parseInt(remain / 3600)
  //计算分钟数
  var remain = remain % 3600
  var mins = parseInt(remain / 60)
  var res = Number(days + 1)
  return res
}

export function getNowTime() {
  var now = new Date()
  var year = now.getFullYear()
  var month =
    now.getMonth() + 1 <= 9 ? '0' + (now.getMonth() + 1) : now.getMonth() + 1
  var day = now.getDate() <= 9 ? '0' + now.getDate() : now.getDate()
  var tt = now.getHours() <= 9 ? '0' + now.getHours() : now.getHours()
  var mm = now.getMinutes() <= 9 ? '0' + now.getMinutes() : now.getMinutes()
  var ss = now.getSeconds() <= 9 ? '0' + now.getSeconds() : now.getSeconds()
  let datelist = [year, month, day, tt, mm, ss]
  return datelist.join('')
}

/* 周天排序 */
export function sortWeeks(weeks) {
  const staticWeeks = [
    { id: 1, name: '周一' },
    { id: 2, name: '周二' },
    { id: 3, name: '周三' },
    { id: 4, name: '周四' },
    { id: 5, name: '周五' },
    { id: 6, name: '周六' },
    { id: 7, name: '周日' }
  ]

  var _weeks = weeks
    .map((item) => staticWeeks.filter((item1) => item1.name === item))
    .flat(Infinity)
    .sort((a, b) => a.id - b.id)

  //将weeks清空并将排序好的值赋给weeks
  const weeksData = []
  if (isContinuityNum(_weeks.map((item) => item.id)) && _weeks.length > 1) {
    weeksData.push(`${_weeks[0].name} 至 ${_weeks.slice(-1)[0].name}`)
  } else {
    for (var i = 0; i < _weeks.length; i++) {
      weeksData.push(_weeks[i].name)
    }
  }

  return weeksData
}

//判断一串数字是否是连续的
function isContinuityNum(num) {
  let array = []
  if (num instanceof Array) {
    array = [...num]
  } else {
    array = Array.from(num.toString()) //转换为数组
  }

  var i = array[0]
  var isContinuation = true
  for (var e in array) {
    if (array[e] != i) {
      isContinuation = false
      break
    }
    i++
  }
  return isContinuation
}